Description:-A generator consisting of a flywheel (1) containing an even number of alternately faced permanent magnets (2) in one or more concentric rings (two rings in this analysis).These magnets are held in place by two non ferrous castings (3) screwed together with non ferrous screws and clamped together on the perimeter by a stainless steel band (4). The castings also hold in place a centre boss (5).

The flywheel is rotated (in this case at 2000 r.p.m.) between two sets of induction coils (6) and (7) alternately wound on plastic bobbins (8) which are placed on thelaminated core projections on the circular cores (9) and (10), the ends of the core projections are then capped with cross pieces on alternate laminations which are of different lengths to allow for this, and are fixed in position with magnesite impregnated resin.

The coils in the outer ring of this 240 V. A.C. generator are wound with 0.5 mm copper wire at 340 turns per coil producing 40 volts at 1.4 Amps A.C. (56 Watts). Twelvecoils on each side of the flywheel are series connected in six groups of four coils which are then connected in parallel. The two sides are set at 90° phase difference. Each group of four coils produces 160 volts A.C. at 1.4 Amps and are separately bridge rectified as shown in drawings sheet (3). The six groups are connected in parallel toproduce 160 volts D.C. at 8.4 Amps. They are separately rectified to prevent feed back. This combined circuit is protected from a low voltage-high amperage feeder circuitfrom the inner ring of coils by two 35 Amp diodes.

The inner ring of coils are alternately wound with 1.2 mm copper wire at 64 turns per coil producing 4 volts at 6 Amps each and are series connected in six groups of twoseries connected couples each producing 8 volts at 6 Amps which are separately bridge rectified and connected in parallel to produce 8 volts at 30 Amps D.C. This is thenparallel connected to the 160 volt 8.4 Amp primary supply which when combined produce 160 volts at 30 Amps D.C. The low voltage producing only a slight ripple on the 90° phase split D.C. sine pulse.

The inner rings of coils are also 90° of phase apart and set 45° out of phase from the outer rings of coils. The primary reasons for the phase differences is to minimise magnetic locking and to smooth the D.C pulse.

The 160 volts 30 Amp D.C. supply is now fed into a storage capacitor of 0.3 micro farads with a resultant voltage of 240 volts D.C. which is then inverted, pulse width modulated and final filtered.

The 1:1 transformer (drawing sheet (3) ) is centre tapped and the primary winding being of less mass than the total winding mass of the generator.

The inner rings of coils will have four spare coils which can be wound for either 3, 6, 9 or 12 volts and can be used for the driver circuit of the inverter and a battery charger etc.

Output of this generator is 240 volts A.C. at approximately 30 Amps or 7.2 Kw at 2000 r.p.m. The input at shaft (12) needed, is approximately 600 Watts.

Note this generator can be designed to almost any usable size and can be multiples driven by one drive motor.

A usable formula for the number of magnets in a single ring and rotation speed is: Mn = 60 x 400 / Rt

Where Mn is the number of magnets in the ring, Rt being the RPM of the flywheel, and 400 is the constant.

This generator will produce considerably more power than that required to drive it.